CN218727867U - Online quantitative testing device for gas production of soft package battery - Google Patents
Online quantitative testing device for gas production of soft package battery Download PDFInfo
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- CN218727867U CN218727867U CN202222962549.1U CN202222962549U CN218727867U CN 218727867 U CN218727867 U CN 218727867U CN 202222962549 U CN202222962549 U CN 202222962549U CN 218727867 U CN218727867 U CN 218727867U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses an online quantitative testing device for the gas production of a soft package battery, which comprises a cell testing clamp, a gas production output assembly, a guide tube and a gas production measuring assembly which are connected in sequence; the cell test fixture comprises two aluminum plates connected through a fastening bolt, the cell is clamped between the two aluminum plates, the pretightening force applied to the two sides of the cell is adjusted through the fastening bolt, and a round hole is formed in the center of one aluminum plate; the gas production output assembly comprises a sealing cap tightly attached to the surface of the battery cell and a bent pipe connected with the sealing cap, and the other end of the bent pipe penetrates through the round hole of one of the aluminum plates and is connected with the guide pipe; the gas production measuring assembly comprises a measuring hose connected with the guide pipe and a gas pressure gauge connected with the measuring hose, the gas pressure gauge is used for measuring the real-time pressure of gas in the hose, a movable liquid column is arranged in the measuring hose, and the volume of produced gas is obtained by measuring the moving distance of the liquid column.
Description
Technical Field
The utility model belongs to the technical field of the lithium cell test, concretely relates to online quantitative test device of gas is produced to laminate polymer battery.
Background
With the rapid development of the electric vehicle industry and the energy storage industry, a high-capacity lithium battery becomes a research and development concern, and among them, a flexible package lithium battery with high energy density and long cycle life is also favored. The lithium battery generates gas in the process of charging and discharging (tests such as initial formation, overcharge, overdischarge, high-temperature storage, high-temperature cycle and the like), the generation of the gas can cause the expansion of a pole piece and increase the internal resistance of the battery, so that the cycle performance of the battery is greatly influenced, the more the gas is generated, the poorer the cycle performance of the battery is, and the capacity is rapidly attenuated, so that the monitoring of the amount of the gas generated in the test processes such as the initial formation, the overcharge, the overdischarge, the high-temperature cycle storage and the like of the lithium battery is particularly important. By monitoring the gas production, researchers can be better guided to optimize and improve the battery materials and the battery design. For example, "a lithium ion soft package battery gas production testing device" disclosed in the chinese utility model patent with the publication number of CN203479356U and "a lithium ion battery gas production testing device" disclosed in the chinese utility model patent with the publication number of CN 204085772U.
However, most gas production estimates require destructive testing, either by draining or venting. The adopted tool clamp is very complex no matter a drainage method or an exhaust method, and the online measurement and evaluation of the gas production pressure and the gas production rate of the soft package battery in the test process is difficult to carry out conveniently. Therefore, it is very important how to use a simple reusable device to record the gas production data on line in a quantitative manner in the whole cycle or storage period.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an online quantitative test device of laminate polymer battery gas production to solve present laminate polymer battery in the long-term test processes such as circulation, storage or float and fill, the unable real-time measurement of battery gas production pressure and gas production are difficult to direct quantization computation, thereby are difficult to aassessment laminate polymer battery in long-term test, and the battery gas production is to the technical problem of the influence of battery performance and safety.
In order to achieve the technical purpose, the technical scheme of the utility model a laminate polymer battery produces online quantitative test device of gas, including the electric core test fixture, the product output subassembly, guiding tube and the product measuring subassembly that connect gradually.
The battery cell test fixture comprises two aluminum plates connected through a fastening bolt, the battery cell is clamped between the two aluminum plates, the pretightening force on two sides of the battery cell is adjusted and applied through the fastening bolt, and a round hole is formed in the center of each aluminum plate and used for leading out the gas production output assembly.
The gas production output assembly comprises a sealing cap and a bent pipe, the sealing cap is tightly attached to the surface of the battery core, the bent pipe is connected with the sealing cap, and the other end of the bent pipe penetrates through the round hole of one of the aluminum plates and is connected with the guide pipe.
The guide pipe is used for conveying the generated gas from the gas generation output assembly to the gas generation measuring assembly.
The gas production measuring assembly comprises a measuring hose connected with the guide pipe and a gas pressure gauge connected with the measuring hose, the gas pressure gauge is used for measuring the real-time pressure of gas in the measuring hose, a movable liquid column is arranged in the measuring hose, and the volume of the produced gas is obtained by measuring the moving distance of the liquid column.
Preferably, the two aluminum plates are respectively a first aluminum plate and a second aluminum plate, and the center of the first aluminum plate is provided with the round hole.
Preferably, the first aluminum plate and the second aluminum plate have the same shape and size.
Preferably, the diameter of the round hole is 20-35 mm.
Preferably, the sealing cap is a vacuum chuck type sealing cap, the sealing cap comprises a suction disc surface which is sucked on the surface of the electric core, the middle part of the suction disc surface protrudes upwards, one end of the bent pipe is connected to the protrusion in a sealing mode, and the other end of the bent pipe penetrates through the round hole.
Preferably, the surface of the sucker is coated with an electrolyte-resistant glue layer for sealing the sucker surface and the cell aluminum-plastic film.
Preferably, the elbow is a 90-degree elbow, the vertical end of the elbow is connected with the protrusion, and the horizontal end of the elbow is connected with the guide pipe.
Preferably, the inner diameter of the elbow is 3mm.
Preferably, the guide tube is a stainless steel tube with an outer diameter of 3mm, and the length of the guide tube is 5-10 cm.
Preferably, the measuring hose is a transparent hose, the inner diameter of the transparent hose is 2.5-3 mm, and the liquid column is yellow silicone oil body.
The beneficial effects of the utility model include:
different from the prior art, the utility model provides an online quantitative testing device of soft-package battery gas production, including the electric core test fixture, the gas production output subassembly, guiding tube and the gas production measuring subassembly that connect gradually, the cost has been practiced thrift by a wide margin to the segmentable disassembling and reuse; the production is convenient, the data reading is convenient, the gas production pressure can be read in real time and the gas production quantity can be calculated quantitatively in the long-term test process, so that the gas production quantity change of the soft package battery in the actual use process can be evaluated in real time; and simultaneously, the utility model discloses a testing arrangement can simulate the operating mode of electric core in-service use process, and test data is more accurate.
Drawings
Fig. 1 is a schematic view of the overall structure of the testing device of the present invention;
fig. 2 is a schematic structural view of a first aluminum plate according to the present invention (a second aluminum plate is the same as the first aluminum plate, except that it has no central circular hole);
fig. 3 is a schematic structural diagram of the gas production output assembly mounted on the surface of the battery cell.
Shown in the figure:
10-a battery cell test fixture, 11-a first aluminum plate, 12-a second aluminum plate and 13-a circular hole;
20-a gas output component, 21-a sealing cap, 211-a sucker surface, 212-a bulge and 22-a bent pipe;
30-a guide tube;
40-gas production measuring component, 41-measuring hose, 42-gas pressure gauge, 43-liquid column;
and (5) 50-cell.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Please refer to fig. 1-3 together, the utility model provides an online quantitative test device of laminate polymer battery gas production, its main application scene is the online quantitative measurement of gas production under the laminate polymer battery simulation in-service use operating mode test, including the electric core test fixture 10, the gas production output subassembly 20, the guide tube 30 and the gas production measuring subassembly 40 that connect gradually.
Wherein, it is different with the complicated anchor clamps structural style of current drainage method and exhaust method, the utility model discloses an electricity core test fixture 10 is only including two aluminum plates through fastening bolt connection, and electricity core 50 is held by the centre gripping between two aluminum plates, and the accessible fastening bolt adjusts the pretightning force of applying at electricity core 50 both sides, makes electricity core pressed from both sides tightly, and wherein one aluminum plate's center is provided with round hole 13, and the output subassembly 20 of producing gas sets up on electric core surface, and passes through round hole 13 is drawn forth. The battery cell test fixture 10 with the structure is simple in structure, simple to operate and reusable.
The gas production output assembly 20 comprises a sealing cap 21 tightly attached to the surface of the battery cell 50 and a bent pipe 22 connected with the sealing cap 21, and the other end of the bent pipe 22 passes through the round hole 13 of one of the aluminum plates to be connected with the guide pipe 30; in this way, the gas generated by the battery cell 50 enters the guiding pipe 30 through the bent pipe 22, and is then transmitted to the gas generation measuring assembly 40 through the guiding pipe 30 for measurement.
The gas production measuring assembly 40 comprises a measuring hose 41 connected with the guide pipe 30 and a gas pressure gauge 42 connected with the measuring hose 41, wherein the gas pressure gauge 42 is used for measuring the real-time pressure of the gas in the measuring hose 41, a movable liquid column 43 is arranged in the measuring hose 41, and when the amount of the gas changes, the volume of the produced gas can be obtained by measuring the moving distance of the liquid column 43, so that the amount of the produced gas can be calculated. The whole testing device is simple in structure, and all parts can be detachably connected, so that the testing device can be repeatedly utilized, and the cost is saved.
In a specific embodiment, the cell testing jig 10 includes a first aluminum plate 11 and a second aluminum plate 12, the circular hole 13 is disposed in the center of the first aluminum plate 11, and the first aluminum plate 11 and the second aluminum plate 12 have the same shape and size. In practical applications, the circular hole 13 may also be formed on the second aluminum plate 12, and if the circular hole 13 is formed on the second aluminum plate 12, the gas generation output assembly 20, the guide pipe 30 and the gas generation measurement assembly 40 are correspondingly installed on one side of the second aluminum plate 12.
Optionally, the pretightening force applied to both sides of the battery cell 50 can be adjusted by adjusting the fastening bolt, and in actual use, the pretightening force of 1000 to 3000N is generally required to be set for the actual use of the battery cell 50.
In a particular embodiment, the diameter of the circular hole 13 is about 35mm.
In a specific embodiment, the sealing cap 21 is a vacuum chuck type sealing cap, the sealing cap 21 includes a suction surface 211 attached to the surface of the battery cell 50, a protrusion 212 is formed on a middle portion of the suction surface 211, and one end of the elbow 22 is hermetically connected to the protrusion 212.
Optionally, the suction disc surface 211 and the protrusion 212 are of an integrated structure made of PVP, the suction disc surface 211 is very thin, and the suction disc surface 211 is coated with an electrolyte-resistant adhesive layer to ensure sealing between the suction disc surface 211 and the electrical core 50 aluminum plastic film.
In one specific embodiment, the elbow 22 is a 90 ° elbow, the vertical end of which is connected to the boss 212 and the horizontal end of which is connected to the guide tube 30.
Optionally, the inner diameter of the elbow is 3mm.
In a specific embodiment, the guide tube 30 is a 304 stainless steel tube with an outer diameter of 3mm, and the length of the guide tube is 5-10 cm. One end of the guide pipe 30 is connected with the elbow 22, the other end of the guide pipe is connected with the measuring hose 41, the guide pipe 30 is fixed on the side face of the electrical core test fixture 10 through an adhesive tape, so that the stability of the system structure is convenient to maintain, and the guide pipe can be detached for subsequent use after the test is completed.
In a specific implementation, the measuring hose 41 is a transparent hose made of silica gel, the inner diameter of the transparent hose is 2.5-3 mm, and the length is set according to requirements; the liquid column 43 in the measuring hose 41 is yellow silicone oil body, has good sealing performance and observability, is convenient for experimental observation and recording, and can record the position of the liquid column 43 in the measuring hose 41 according to different moments for calculating the gas production volume.
Optionally, the gas gauge 42 is a precision digital gauge, which can read and record test data in real time, and can be disassembled for reuse.
The utility model provides a pair of online quantitative testing arrangement of laminate polymer battery gas production's application method as follows:
1. after the first aluminum plate 11 and the second aluminum plate 12 are manufactured, the battery cell is assembled with a normal battery cell and is circulated to the battery cell to be baked;
2. gluing and sealing the area of the plate surface where the sucking disc surface 211 is contacted with the first aluminum plate 11, and leading the bent pipe 22 out of the round hole 13;
3. a liquid column 43 of yellow silicone oil is added to the measuring hose 41;
4. the guide pipe 30, the measuring hose 41 and the gas pressure gauge 42 are connected in sequence, the initial position of the liquid column 43 is marked, the moving distance of the liquid column 43 is calculated, and the device can be used for judging whether the device sucks air reversely or not;
5. reading gas production pressure data and calculating gas production:
the change of the position of the silicone oil can be observed periodically (for example, 100 times per cycle or 7 days per storage) according to the test requirements, the pressure data can be read and recorded, the pressures on the left side and the right side of the liquid column 43 are equal according to the force balance principle, and the gas pressure gauge 42 reads the dataNamely the gas pressure P generated by long-term test, the gas generation volume is calculated as follows: the distance Δ L = L by which the liquid column 43 moves 2 -L 1 ，L 1 For the initial position of the liquid column 43 in the measuring tube 41, L 2 To observe the changed position of the liquid column 43 after a certain period of time, the gas production volume was V = Δ L (R) 1 /2) 2 ，R 1 To measure the diameter of the hose 41, a calculation of the amount of gas-generating substance is obtained: according to the ideal gas state equation PV = nRT, where P is the equilibrium manometer reading; v is the volume of gas generated; n is the amount of gaseous species; r is a molar gas constant; t is the temperature in Kelvin; the amount of gas substances n = (PV)/(RT) can be directly obtained from the formula, and the real-time gas production substance amount in the actual test process can be calculated.
To sum up, adopt the utility model provides an online quantitative test device of laminate polymer battery gas production has following advantage: 1. the device can be disassembled in multiple sections for repeated use, so that the cost is greatly saved; 2. the occupied space is small, the implementation and the operation are simple and convenient, the reading is quick and convenient, and the observation of abnormal conditions is convenient; 3. the method can be used for long-term tests such as storage, circulation, floating charge and the like, can perform online measurement, calculates gas production data in real time, and has great significance for gas production performance evaluation.
The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. An online quantitative testing device for gas production of a soft package battery is characterized by comprising a battery cell testing clamp, a gas production output assembly, a guide pipe and a gas production measuring assembly which are sequentially connected;
the battery cell test fixture comprises two aluminum plates connected through a fastening bolt, the battery cell is clamped between the two aluminum plates, the pretightening force applied to two sides of the battery cell is adjusted through the fastening bolt, and a round hole is formed in the center of one aluminum plate and used for leading out the gas production output assembly;
the gas production output assembly comprises a sealing cap tightly attached to the surface of the battery core and a bent pipe connected with the sealing cap, and the other end of the bent pipe penetrates through the round hole of one of the aluminum plates and is connected with the guide pipe;
the guide pipe is used for conveying the generated gas from the gas generation output assembly to the gas generation measuring assembly;
the gas production measuring assembly comprises a measuring hose connected with the guide pipe and a gas pressure gauge connected with the measuring hose, the gas pressure gauge is used for measuring the real-time pressure of gas in the measuring hose, a movable liquid column is arranged in the measuring hose, and the volume of the produced gas is obtained by measuring the moving distance of the liquid column.
2. The online quantitative testing device of soft package battery gas production of claim 1, characterized in that, the two aluminum plates are a first aluminum plate and a second aluminum plate respectively, and the center of the first aluminum plate is provided with the round hole.
3. The online quantitative gas production testing device for the soft package battery according to claim 2, wherein the first aluminum plate and the second aluminum plate are the same in shape and size.
4. The online quantitative testing device for the gas production of the soft package battery according to claim 3, wherein the diameter of the circular hole is 20-35 mm.
5. The online quantitative testing device of soft package battery gas production of claim 1, characterized in that the sealing cap is a vacuum chuck type sealing cap, the sealing cap comprises a suction disc surface attached to the surface of the battery core, the middle part of the suction disc surface protrudes upwards, one end of the bent tube is connected to the protrusion in a sealing manner, and the other end of the bent tube penetrates through the round hole.
6. The online quantitative testing device of the gas production of the soft package battery according to claim 5, characterized in that the suction cup face is coated with an electrolyte-resistant glue layer for sealing the suction cup face and the cell aluminum-plastic film.
7. The online quantitative testing device for the gas production of the soft-package battery according to claim 5, characterized in that the bent pipe is a 90-degree bent pipe, the vertical end of the bent pipe is connected with the protrusion, and the horizontal end of the bent pipe is connected with the guiding pipe.
8. The online quantitative testing device for the gas production of the soft package battery according to claim 7, wherein the inner diameter of the bent pipe is 3mm.
9. The online quantitative test device of the gas production of the soft package battery according to claim 1, characterized in that the guide tube is a stainless steel tube with an outer diameter of 3mm, and the length of the guide tube is 5-10 cm.
10. The online quantitative testing device of the gas production of the soft package battery according to claim 1, characterized in that the measuring hose is a transparent hose, the inner diameter of the transparent hose is 2.5-3 mm, and the liquid column is yellow silicone oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222962549.1U CN218727867U (en) | 2022-11-08 | 2022-11-08 | Online quantitative testing device for gas production of soft package battery |
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| CN202222962549.1U CN218727867U (en) | 2022-11-08 | 2022-11-08 | Online quantitative testing device for gas production of soft package battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117053736A (en) * | 2023-10-13 | 2023-11-14 | 南通市迈越通新能源有限公司 | Intelligent measuring device for compression amount of new energy battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117053736A (en) * | 2023-10-13 | 2023-11-14 | 南通市迈越通新能源有限公司 | Intelligent measuring device for compression amount of new energy battery |
| CN117053736B (en) * | 2023-10-13 | 2023-12-19 | 南通市迈越通新能源有限公司 | Intelligent measuring device for compression amount of new energy battery |
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